What started as an escape from nightmares became a playful fight with your older brother Jace as a form of comfort.
You'd snuck into his chambers through a secret passage in Dragonstone after another one of your nightmares as you'd always done when you were even younger, and there was nothing your older brother couldn't help you with; Jace had a soft spot for you and always treated you gently as if you were a fragile doll. Whether it was because he and you both believed you were to be betrothed to one another or simply because he saw you as delicate you'd never know.
Jacaerys cuddled with you in his bed until you were sure you weren't frightened anymore and then he suggested that you both have a pillow fight as a seastorm raged on outside the walls of the castle. You agreed, but soon enough the pillows were forgotten, thrown carelessly onto the floor of his bedroom, both your hands and his proven to be enough
Your giggles filled his room and it was a wonder your mother hadn't come in to scold you again
"Shhh" Jacaerys grinned as he tried to keep you quiet while wrestling you against the pillow, him being much stronger than you even though he wasn't using all his strength.
"We must be quiet" He murmured, his nose burying into your neck as you calmed down "Are you feeling better now?" He whispered against your skin as he settled on top of you, gently soothing you and not anticipating your next move